Using php-fpm

There is no adaptive spawning anymore in recent lighttpd releases. For dynamic management of PHP processes, you can use php-fpm.

# pacman -S php-fpm
# rc.d start php-fpm

Note: You can configure the number of servers in the pool and tweak other configuration options by editing the file /etc/php/php-fpm.conf. More details on php-fpm can be found on the php-fpm website. You should also note that when you make changes to /etc/php/php.ini you will need to restart php-fpm